How do I exercise my inner thighs?

Side lunges are effective for training your inner thighs.

A good way to exercise the inside of your thighs is to lie on your back with your feet straight up in the air so that your hips are bent at approximately 90 degrees. It is okay if you need to bend your knees a bit. Allow your legs to slowly fall to the sides so that they make a "V" in the air. Pause when you feel a slight stretch in your inner thighs - this should occur when your thighs form approximately a 60 - 90 degree angle, depending on your flexibility. After a brief pause, squeeze your thighs together to bring your legs back to midline. Pause and repeat. Do 3 sets of 12 repetitions. If your back hurts while doing this exercise, try doing a posterior pelvic tilt at the same time. If your pain persists, try using your hands to support your buttocks. If pain persists despite these modifications, stop the exercise.